creating first structure of cinema backend server

Signed-off-by: Peter Siegmund <developer@mars3142.org>

server/cinema/lib/feature/poster/models/poster_request.schema.dart

@@ -0,0 +1,30 @@
+import 'package:cinema/feature/poster/models/poster.enums.dart';
+import 'package:zard/zard.dart';
+
+final _orientations = PosterOrientation.values.map((e) => e.name);
+final _formats = PosterFormat.values.map((e) => e.name);
+final _outputs = PosterOutput.values.map((e) => e.name);
+
+final posterSchema = z.map({
+  'width': z.int().min(1, message: "'width' must be at least 1").max(4000, message: "'width' must be at most 4000"),
+  'height': z.int().min(1, message: "'height' must be at least 1").max(4000, message: "'height' must be a most 4000"),
+  'count': z.int().min(1, message: "'count' must be at least 1").max(20, message: "'count' must be at most 20"),
+  'orientation': z.string().refine(
+    (value) => _orientations.contains(value),
+    message: "'orientation' must be either ${_orientations.join(', ')}",
+  ),
+  'shuffle': z.bool(message: "'shuffle' must be a boolean value"),
+  'language': z.string(message: "'language' must be a string").transform((value) => value.trim()),
+  'backgroundColor': z.string().regex(
+    RegExp(r'^#([a-fA-F0-9]{3}|[a-fA-F0-9]{6})$'),
+    message: "The 'backgroundColor' must be a valid hexadecimal color code (e.g., #000 or #FF0000)",
+  ),
+  'format': z.string().refine(
+    (value) => _formats.contains(value),
+    message: "'format' must be either ${_formats.join(', ')}",
+  ),
+  'output': z.string().refine(
+    (value) => _outputs.contains(value),
+    message: "'output' must be either ${_outputs.join(', ')}",
+  ),
+});